基于DSP的血压计设计与实现

设计一种基于(DSP)的、带USB接口的大容量存储的电子血压计.该系统充分利用TMS320VC5402的片内外资源和结合电源管理的设计,使系统具有低功耗、便携式的特点.通过USB与PC机进行数据传送实现血压信息的远程监控,触摸屏的运用使操作更加简单.利用示波法测量血压值,经过校正后得到准确的血压测量值,温度补偿算法使得...     

3%高渗盐水联合氨溴索高频雾化吸入治疗毛细支气管炎43例临床观察

目的:探讨高频雾化吸入3%高渗盐水联合氨溴索治疗中、重度毛细支气管炎的疗效,为治疗毛细支气管炎提供参考。方法:采取随机对照方法,将85例中、重度毛细支气管炎住院患儿分成治疗组43例和对照组42例。在常规抗感染、止咳、化痰、雾化吸入激素、沙丁胺醇平喘治疗下,治疗组给予3%高渗盐水1.5 mL+盐酸氨溴索注射液15 mg高频雾化吸入,2次/d;对照组予生理盐水1.5 mL+盐酸氨溴索注射液15 mg高频雾化吸入,2次/d。两组疗程均为7～10 d。比较两组咳嗽、喘息、肺部湿啰音消失时间及住院时间、不良反应及住院费用。结果:两组患儿均痊愈出院,但治疗组在其咳嗽、喘息、肺部干湿啰音消失时间、住院时间及住院费用等方面均优与对照组(P<0.05)。结论:3%高渗盐水联合氨溴索高频雾化吸入是治疗中、重度毛细支气管炎的一种有效方法,并能减少住院时间,降低治疗费用。     

Leptin withdrawal after birth: a neglected factor account for cognitive deficit in offspring of GDM mother

Pregnancy in the diabetic woman has long been associated with an increased risk of cognitive deficit in the offspring, which might be associated with the poor intrauterine environment for the developing fetal brain. Leptin, as an important hormone regulating the intrauterine and early extrauterine life growth and development, greatly elevated during diabetic pregnancy. The current results indicate that leptin exerts neurotrophic actions during the critical period of development of hippocampus, and acts as a cognitive enhancer. Leptin resistance was a common phenomenon in diabetic pregnancies resulting reduced leptin receptors and signaling. With sudden withdrawal of placenta-derived leptin after birth, neonatal leptin levels declined sharply. The declined leptin could not work normally with the reduced leptin receptor and thus affected the newborn’s brain development, which at least partly accounted for later cognitive deficits of offspring of GDM mother. Our hypothesis provides an alternative strategy to decrease the risk of cognitive deficit of offspring of diabetic mother, by exogenously supplementing leptin after birth for some period.     

Fluid dynamics analysis of a novel micropatterned cell bioreactor

Although flow-based bioreactor has been widely used to provide sufficient mass transportation and nutrient supply for cell proliferation, differentiation, and apoptosis, the underlying mechanism of cell responses to applied flow at single cell level remains unclear. This study has developed a novel bioreactor that combines flow bioreactor with microfabrication technique to isolate individual cells onto micropatterned substrate. A mechanical model has also been developed to quantify the flow field or the microenvironment around the single cell; flow dynamics has been analyzed on five geometrically different patterns of circle-, cube-, 1:2 ellipse-, 1:3 ellipse-, and rectangle-shaped “virtual cells.” The results of this study have demonstrated that the flow field is highly pattern dependent, and all the hydrodynamic development length, cell spacing, and orientation of inlet velocity vector are crucial for maintaining a fully developed flow. This study has provided a theoretical basis for optimizing the design of micropatterned flow bioreactor and a novel approach to understand the cell mechanotransduction and cell–surface interaction at single cell level.     

大叶冬青化学成分研究

目的研究大叶冬青中的化学成分。方法应用硅胶及Sephadex LH-20凝胶柱色谱法对其化学成分进行分离,并利用核磁共振（NMR）和质谱（MS）等方法鉴定分离得到的化合物。结果从大叶冬青的干燥叶中分离得到8个化合物,分别鉴定为羽扇豆醇、熊果酸、23-羟基齐墩果酸、熊果醇、27-羟基-α-香树脂醇、坡模酸、3β,23-二羟基乌索-12-烯-28-酸、羽扇-20（29）-烯-3β,24-二醇。结论该植物具有较好的研究价值。     

Microfluidic system for formation of PC-3 prostate cancer co-culture spheroids

The niche microenvironment in which cancer cells reside plays a prominent role in the growth of cancer. It is therefore imperative to mimic the in vivo tumor niche in vitro to better understand cancer and enhance development of therapeutics. Here, we engineer a 3D metastatic prostate cancer model that includes the types of surrounding cells in the bone microenvironment that the metastatic prostate cancer cells reside in. Specifically, we used a two-layer microfluidic system to culture 3D multi-cell type spheroids of fluorescently labeled metastatic prostate cancer cells (PC-3 cell line), osteoblasts and endothelial cells. This method ensures uniform incorporation of all co-culture cell types into each spheroid and keeps the spheroids stationary for easy tracking of individual spheroids and the PC-3's residing inside them over the course of at least a week. This culture system greatly decreased the proliferation rate of PC-3 cells without reducing viability and may more faithfully recapitulate the in vivo growth behavior of malignant cancer cells within the bone metastatic prostate cancer microenvironment.     

智能纳米材料在细胞水平治疗疾病时的应用

摘要：恶性肿瘤的常规治疗方法在临床应用中存在着或多或少的缺陷。为了实现靶向治疗及提高药物利用度等目的,一类具有智能效应(如热敏感、pH敏感、磁敏感以及光敏感等)的纳米材料已被应用到细胞水平治疗疾病的领域中。它们是通过药物靶向缓释、热效应和可控机械力等方式,杀死靶组织内的病理细胞,进而实现疾病的治愈。文章综合讨论了应用该类材料在细胞水平治疗疾病的最新进展,同时展望了其存在的问题以及发展前景。     

基于全科医师职业能力的专科层次临床医学专业(全科医学方向)课程体系研究

目的 深入分析全科医师职业能力,构建专科层次临床医学专业(全科医学方向)的课程体系.方法 分层随机抽样选取社区卫生服务机构12名全科医师进行问卷调查和小组访谈,让其填写1个月的工作日志.基于全科医师职业能力的专科层次临床医学专业(全科医学方向)课程体系经两轮专家咨询(Delphi法)后确定.结果 社区全科医师的主要任务依次为留观患者、疾病诊治、常见症状诊治、社区健康教育、健康体检、健康咨询、慢病管理等.按全科医师工作任务和职业能力从"预防、保健、医疗、康复"四方面构建以社区为基础的课程体系.结论 建立基于全科医师职业能力的专科层次临床医学专业(全科医学方向)课程体系,推行"以社区为基础的教育结合社区为问题的学习"(CBE-PBL)的培养模式,才能适应社区卫生服务发展对全科医师培养的需要.     

参附注射液对局灶性脑缺血再灌注损伤大鼠中枢神经系统病理学的影响

目的:研究参附注射液(SFI)对局灶性脑缺血再灌注损伤大鼠中枢神经系统病理学的影响。方法:80只雄性大鼠均分为4组,即空白对照、假手术、模型和SFI组。大鼠麻醉5min后经尾iv参附注射液10mg·kg-1,复制右侧大脑中动脉缺血2h再灌注24h模型。比较各组血脑屏障和大脑皮质神经元的病理改变以及相应功能的变化。结果:电镜下模型组大脑皮质毛细血管周围水肿及管腔受压严重,神经元肿大,细胞膜连续性中断,胞浆肿胀、空泡化,细胞核肿胀、破裂,核基质密度增加,异染色质增加。SFI组大脑皮质毛细血管周围水肿和毛细血管管腔受压程度明显轻于模型组,神经元肿胀,细胞膜边界欠清楚,胞浆肿胀,细胞核肿胀,核膜尚完整,核基质密度轻度增加,异染色质轻度增加。与模型组比较,SFI组缺血2h神经功能缺损评分无显著性改变;SFI组再灌注24h后神经功能缺损评分显著降低(P<0.01)。结论:SFI可减轻局灶性脑缺血再灌注损伤大鼠中枢神经系统病理学改变程度,进而减轻神经功能受损伤的程度。     

液-质联用法测定犬血浆中苯环喹溴铵的浓度

目的:建立HPLC-MS测定犬血浆中苯环喹溴铵浓度的方法。方法:色谱柱为Phenomenex C18(2)100A(Luna3μm,100mm×2.0mm),预柱为Luna C18(2)(3μm,10mm×2.0mm)柱,流动相为含1%甲酸的醋酸铵(8mmol.L-1)溶液-甲醇(47∶53),流速为0.20mL.min-1;ESI选择性正离子检测。结果:在5~3 600μg.L-1范围内,苯环喹溴铵血药浓度呈线性关系,r=0.999 4。最低检测限为3μg.L-1,日内、日间精密度RSD均小于9.3%。结论:本方法专属性强,灵敏度高,准确性好,适合狗血浆中苯环喹溴铵的药动学研究。